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복사열전달을 고려한 모형 온수온돌 주택 열성능 시뮬레이션
최영돈,윤종호,홍진관,이남호,강대호,Choi, Y.D.,Yoon, J.H.,Hong, J.K.,Lee, N.H.,Kang, D.H. 대한설비공학회 1993 설비공학 논문집 Vol.5 No.4
Thermal performance of test cell of model hot water Ondol house was simulated by equivalence heat resistence and heat capacity method. In this method wall was replaced by two equivalence and one heat capacity. This method enables to simulate the variation of temperature of each element of model house. The effect of pipe diameter, pitch of pipe and with or without consideration of inter-radiation between wall surfaces on the energy consumption rate were investgated. Results show that radiations between the ground surface of room and wall surfaces contribute to the heating of room air by reducing the convection heat loss through the wall surfaces.
Methylvinlketone에 對한 Mercaptans의 添加反應에 관한 速度論的 硏究
姜大鎬,申甲鐵 慶尙大學校 1975 論文集 Vol.14 No.-
The rate constants for the addition of n-propyl- and n-butylmercaptan to methylvinylketone were determined by iodometry at various pH and temperatures. From these rate constants, we obtained a rate equation K??=k??+k'[OH??]=??????????=k'[OH??] which can be applied over wide pH range. We also calculated the activation parameters(△H??, △S??) From the values obtained above, we reached the conclusion as follows: 1. The reaction is initiated by addition of n-propyl- and n-butylmercaptan molecule below pH 4. 2. The reaction is proceeded by the n-propyl- and n-butylmercaptied ion above pH 6. 3. At pH 4-6, the complex addition reaction mechanism can also be fully explained by the equation obtained. 4. The mercaptan having longer carbon chain has the smaller nucleophilicity, which is based on the values of calculated activation parameters, and this result is in accord with our expectation.